3 Light Sliding Window
A horizontal sliding window with a fixed picture window in the center, both outer sashes slide and meet in the center. Can be 1/3, 1/3 ,1/3 ratio or 1/4, 1/2, 1/4 ratio.
Horizontal Sliding Window
A type of window where the sash(es) operate(s) by sliding along a track in the window frame, moving side to side in either direction.